Device for atomizing pressurized gas or liquid insecticides



Aug. 21. 1956 SHIGESHI SATO 2,759,753

DEVICE FOR ATOMIZING PRESSURIZED GAS OR LIQUID INSECTICIDES Filed Nov. 2, 1955 INVENTOR.

5H1 GESH SATO BY MW A TTORNE Y.

United States Patent DEVICE FOR ATOMIZING PRESSURIZED GAS 0R LIQUID INSECTICIDES Shig'eshi sato, Nakano -ku, Tokyo-to", Japan Application November 2, 1953, Serial No. 389,800

Claims priority, application Japan May 6, 1953 4 Claims. (Cl. 299-95-) The present invention relates to an improved device for atomizing pressurized gas or liquid insecticides in a bomb.

The object of this invention is to provide a device for atomizing pressurized gas or liquid insecticides which is simple in construction and operation and operates positively and automatically within a predetermined required time without fail.

This and other objects of this invention have been accomplished by providing a soluble shutter plate arranged so that it may always shut off the communication between the nozzle or jet hole and the interior of the bomb, but which may be perforated or torn off when it is attacked by a solvent capable of dissolving or softening it, said plate being provided with a lining membrane which resists said solvent, but yet is capable of being readily torn 01f, when said plate is sufficiently weakened by said solvent, by the pressure force of the contents in the bomb or an additional pushing force.

This invention will be more clearly understood by reference to the following detailed description taken in connection with the accompanying drawing, wherein:

Fig. 1 is a sectional side view of an example of this invention.

Fig. 2 is a sectional side view of another example of this invention.

Referring to the illustration of Fig. 1, a metal socket 2 is welded or fixed by any other means on the head of the pressure bomb 1, in which pressurized gas or liquid of insecticide is filled up. In said socket 2 is fitted a metal cylinder 7, in the lower end thereof being fitted a pipe 3 extending into the bomb 1. In the interior of said cylinder 7 are inserted a shutter plate 6 made of a celluloid material capable of being dissolved or softened by a solvent, such as, for example, amyl acetate, a perforator 5 and spiral spring 4 so that said shutter plate may be pushed by said spring through said perforator, in the mouth thereof being fitted a stopper 14. The shutter plate 6 which may, for example, be made of celluloid plate is provided with such lining membrane 6' having a resistivity against said solvent as vinyl chloride or polyethelene layer. A nozzle cylinder 9 provided with a nozzle cap 8 having several nozzles 15 is screwed on the head part of the metal cylinder 7 and fixed by screwing a tightening ring 10 in the socket 2. All parts as described above are covered by a cover cap 11 which is screwed on the socket 2. Each of the packings 12 and 13 is inserted respectively between the nozzle cylinder 9 and nozzle cap 8 and between said cylinder 9 and metal cylinder 7.

The operator of the atomizer illustrated in Fig. 1 is as follows.

At first, a solvent capable of dissolving the celluloid plate 6, for example, amyl acetate is poured into the nozzle cylinder 9 after removal of the cap 11 and nozzle cap 8 and then said cap 8 is screwed on again.

The amyl acetate poured as above reacts chemically Patented Aug. 21, 1956 with the shutter plate 6 and dissolves it resulting in weakening the strength of said plate, so that said plate will be perforated forcibly by the perforator 5 being pushed upwards by the spring 4.

As a result of said perforation, the pressurized gas or liquid of said insecticide in the bomb 1 will be atomized forcibly from the nozzle 15 of the nozzle cap 8 through the orifice perforated as above in the shutter plate. Said operation can be surely and effectively executed by the provision of the lining membrane 6', as will be under stood herein.

In the example illustrated in Fig. 2, a metal socket 18 is screwed in the head of the pressure bomb 16 which is filled up with a pressurized gas or liquid of insecticide. In the base part of socket 18 there is made a hole 26 fitted with a tube or pipe 17 extending into said bomb 16. A shutter plate 25 made of a celluloid material capable of being dissolved or softened by such solvent agent such as described above in connection with the illustration in Fig. l and provided with a lining membrane 25' having a resistivity against said solvent is inserted between the hole 26 and the tube or pipe 17 so as to shut off the hole 26 from the tube or pipe 17.

An air-tight box 19 screwed in the socket 18 and provided with a jet hole 22 is filled with a solvent such as, for example, amyl acetate capable of dissolving or softening said shutter plate 25.

A knife 23 is attached between the base of the socket 18 and the base of the box 19 so that the sharp edge of said knife may abut against the rear surface of the base of said box 19. A cap 20 is screwed 'removably on the box 19 to shut off the jet hole 22 through a packing 21.

The operation of the atomizer illustrated in Fig. 2 is as follows.

Firstly, the cap 20 is taken off and the box 19 is screwed forcibly downwards. Then the base of said box is cut off by the sharp edge of the knife 23 resulting in perforation of said base, so that the solvent 24 flows out downwards through the hole 26 and comes in contact with said shutter plate 25,

As a result of said contact, the plate 25 will be dissolved or softened and will be perforated by the pressure force of the contents in the bomb 16, so that the pressurized gas or liquid of insecticide in the bomb 16 will be atomized forcibly from the nozzle 22.

In the operation of the atomizers illustrated in Figs. 1 and 2, it requires some time until said perforation or rupture due to chemical reaction between the shutter plate and the solvent occurs.

This required time can be adjusted by controlling the time of chemical reaction by means of the proper selection of the thickness and material of the shutter plate and its lining membrane, so that it is possible to select freely the time-limit required.

When the atomizer of this invention is to be used, for example, to atomize insecticide in the storehouse, in which provisions are stored, it is only necessary to leave said atomizer in the storehouse after taking off the nozzle cap and pouring any suitable solvent into the nozzle cylinder in the case of the example illustrated in Fig. l and after taking off the cap and screwing the nozzle box downwards in the socket in the case of the example illustrated in Fig. 2.

It is clear from the above, that the atomizer of the type illustrated in Figs. 1 and 2 is meritorious, it is very simple in construction and treatment and atomization can be done automatically within a desirable timelimit, so that it is very suitable for use in various areas or sections, for example, of a storehouse.

Generally, however, the soluble shutter plate such as 6 or 25 in the example of Fig. l or 2, which can be dissolved or softened by a solvent, has some pinholes even if it has been manufactured carefully, so that when said shutter plate is provided with no such lining membrane as shown by 6' or 25' in the illustrations, the solvent poured on said plate will be blown up by the pressure force of the pressurized contents in the bomb, which passes through said pinholes, before said plate is sufiiciently weakened so as to be perforated or torn off by the pushing force of a perforation or said pressurized contents, whereby normal operation will become impossible.

According to this invention, however, the shutter plate is provided with such lining membrane, which is not damaged by the solvent used, as shown by 6 or 25' in the examples, so that the gas or liquid under pressure in the pressurized bomb can not jet through the pinholes of the shutter plate until almost all parts of said plate will be dissolved or softened. Therefore, the atomizing operation will be executed efiectively at the same time with perforation or softening of the shutter plate.

Since it is obvious that many changes and modifications can be made in the above-described details without departing from the nature and spirit of this invention, it is to be understood that this invention is not to be limited within the above-described details.

I claim:

1. A device for atomizing pressurized gas or liquid insecticide comprising a container having a top opening and being charged with said insecticide, an atomizing hollow apparatus secured above said top opening and adapted to contain a solvent, a soluble plate so positioned as to shut off communication between said apparatus and the interior of said container and being so constituted as to be weakened by said solvent, said soluble plate being provided with a lining membrane offering greater resistance to said solvent than said plate and being pierceable.

2. A device according to claim 1, including means for piercing said plate.

3. In a device for atomizing pressurized gas or liquid insecticide, the combination of a container having a top opening and being charged with said pressurized insecticide, a metal socket attached to said container at said opening, a metal cylinder fitted in said socket, said metal cylinder having an upper opening and a lower opening,

a hollow member extending into said container from said lower opening, a nozzle member comprising a nozzle cylinder fixed detachably between said socket and said metal cylinder and a nozzle cap having at least one nozzle secured to said nozzle cylinder, said nozzle cylinder having a lower opening, a soluble plate supported between said upper opening of said metal cylinder and said lower opening of said nozzle cylinder adapted to shut off the communication between said latter openings, and a lining membrane attached on the rear surface of said plate and having a resistivity against the solvent capable of weakening said plate, when said plate is sufficiently weakened, and a perforator inserted slidably in said metal cylinder, said metal cylinder having means for urging said perforator against said soluble plate, said membrane being capable of being readily pierced by said perforator when said plate is sufilciently weakened.

4. In a device for atomizing pressurized gas or liquid insecticide, the combination of a container charged with said pressurized insecticide, and having a top opening, a socket attached at said opening and being provided with a base hole, a cylinder fitted in said socket and having an upper and a lower opening, a hollow clement extending into said container and fixed on said lower opening of said metal cylinder, a soluble plate supported between said element and said base hole normally preventing communication between said opening and said hole, a lining membrane attached on the rear surface of said plate and having a resistivity against a solvent capable of weakening said plate, but capable of being readily punctured by the pressure force of the contents in said container, an air-tight box having a jet hole and screwed in said socket and adapted to contain a solvent capable of weakening said soluble plate, a cap attached removably on said box for closing the jet hole of said box, and a knife arranged under the base of said box to sever said base by screwing forcibly said box towards said knife edge.

References Cited in the file of this patent UNITED STATES PATENTS 

